Overview
The ADS8568SPMR is a high-performance, 16-bit successive approximation register (SAR) analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of the ADS85x8 family, which includes 12-, 14-, and 16-bit versions. The ADS8568SPMR features eight simultaneous sampling channels, making it ideal for applications requiring high-speed and precise data acquisition.
Each input channel supports true bipolar input ranges up to ±12 V and includes a programmable, buffered internal reference. The device offers both parallel and serial interface options, with the serial interface operating in SPI mode. The ADS8568SPMR is designed for low-power operation, with an auto-sleep mode to minimize power dissipation when not actively converting data.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16-bit | |
| Number of Channels | 8 | |
| Maximum Data Rate per Channel | 510 kSPS (Parallel), 400 kSPS (Serial) | kSPS |
| Signal-to-Noise Ratio (SNR) | 91.5 dB | dB |
| Total Harmonic Distortion (THD) | -94 dB | dB |
| Input Voltage Range | ±12 V | V |
| Reference Voltage Range | 0.5 V – 2.5 V or 0.5 V – 3.0 V | V |
| Operating Temperature Range | -40°C to +125°C | °C |
| Package Options | 64-pin VQFN, 64-pin LQFP | |
| Power Consumption (at 10 kSPS) | 32 mW | mW |
Key Features
- Eight simultaneous sampling channels with true bipolar input ranges up to ±12 V.
- Programmable, buffered internal reference voltage (0.5 V – 2.5 V or 0.5 V – 3.0 V).
- Selectable parallel or serial interface with daisy-chain capability.
- Excellent AC performance: high SNR (91.5 dB) and low THD (-94 dB).
- Low-power operation with auto-sleep mode for minimum power dissipation.
- Fully specified over an extended industrial temperature range (-40°C to +125°C).
- Available in 64-pin VQFN and LQFP packages.
Applications
- Protection relays: Used in safety and protection systems to monitor and respond to electrical conditions.
- Power quality measurement: For monitoring and analyzing power grid conditions.
- Multi-axis motor control: In applications requiring precise control over multiple motor axes.
- Programmable logic controllers (PLCs): For industrial automation and control systems.
- Industrial data acquisition: For collecting and processing data in various industrial settings.
Q & A
- What is the resolution of the ADS8568SPMR ADC?
The ADS8568SPMR has a resolution of 16 bits.
- How many channels does the ADS8568SPMR support?
The device supports eight simultaneous sampling channels.
- What are the maximum data rates for the ADS8568SPMR?
The maximum data rates are 510 kSPS for parallel interface and 400 kSPS for serial interface.
- What is the input voltage range for the ADS8568SPMR?
The input voltage range is up to ±12 V.
- Does the ADS8568SPMR support both parallel and serial interfaces?
Yes, it supports both parallel and serial interfaces with daisy-chain capability.
- What is the operating temperature range of the ADS8568SPMR?
The operating temperature range is -40°C to +125°C.
- How does the auto-sleep mode function in the ADS8568SPMR?
The auto-sleep mode minimizes power dissipation by activating the hold mode and actual conversion six conversion clock cycles after issuing a conversion start.
- What are some typical applications of the ADS8568SPMR?
Typical applications include protection relays, power quality measurement, multi-axis motor control, programmable logic controllers, and industrial data acquisition.
- What are the package options available for the ADS8568SPMR?
The device is available in 64-pin VQFN and 64-pin LQFP packages.
- How much power does the ADS8568SPMR consume at 10 kSPS?
The power consumption at 10 kSPS is 32 mW.
